For those who want to try the MC Tuner option to disable auto drinking, here's how:
1-click on a sim and select the "MC Command Center" option
2-Select MC Tuner
3-click "Enable Scumbumbo Autonomy Scan" to enable it. You know it's active when the option changes into 'Disabe Scumbumbo Autonomy Scan'
4-When the scan is enabled, clicking on any sink will show you an option "Currently Running Scan". Select that.
5-A menu will open, search for "Grab Water". You may have to go through several pages (click "Next").
6-Click the "[Grab Water]". It will disappear from the list, and that action will no longer be performed autonomously.
Notes:
-If you want to restore a disabled action, go to MC Command Center>MC Tuner>Restore Autonomy, and you'll get a list of the actions you've disabled. Clicking on one will re-enable it.
-With the scan enabled, you can also click anywhere on the lot floor and get the "currently Running Scan" option. It'll give you a different list of options, including a "[Drink]" one. You may have to disable that one as well.